Tackle block



July 14, 1942. H, C.- BEITZ'EL 2,289,337

- TACKLE BLOCK Filed Nov. 2o, 1940 n Jrmce C INVENTOR.

,3f-96M www ATTORNEYS;

Patented July 14, 1942 'rAoxLE BLOCK Horace C. Beitzel, South Milwaukee,Wis., assignor to Bucyrus-Erie Company, South Milwaukee, Wis., acorporation of Delaware Application November zo, 1940, serial No.366,415

(o1. zal-lss) 3 Claims. My invention consists in new and usefulimprovements in tackle-blocks, and more ,specifically intackle-blocksfor earth-moving Scrapers;

The several functions of such scrapers are performed by\ropes whichactuate various tackleblock combinations. Some of these tackle-blockcombinations are of necessity out of sight'of the operator seated on thetractor which pulls the scraper. Accordingly he cannot tell when he isnearing a -block-to-block situation, until that situation occurs, whenhe is apprised. of this situation by hearing the blocks clink together,whereupon he must immediately unclutch his winch, lest he pull some partof the mechanism out by the roots. He may even not hear the elink, beingiirst apprised of being block-to-block by the drag on his engine.

.He is thus confronted with a dilemma: he must either approach theblock-to-block condition slowly and cautiously, thus slowing-downproduction, or keep tiringly on the alert.

Accordingly the principal object of my invention is to devise atackle-block assembly which will warn the operator and give him ampletime after such Vwarning in which to unclutch -his winch, and which willnot damage the machinery if the winch continues to operate after theblockto-block situation is reached.

In addition to my principal object, above stated, I have worked out anumber of novel and useful details, which will be readily evident asthe` description progresses.

My invention consists inthe novel parts and in the combination andarrangement thereof,

which are defined in the appended claims, andof which one embodiment isexemplified inthe accompanying drawing, which is' hereinafter 'pareticularly described and explained.

Throughout the description, the same reference number -is applied to.the same member or to similar members.

Figure 1 is a side elevation of a scraper, con taining my invention.

Figure 2 is an enlarged side elevation of the sheave-block assembly ofmyinvention. Figure 3 is a slant front elevation of my sheaveblock.:lassembly, taken slightly downward, along the lines 3 3 of Figure 1.

Referring to Figure 1, we see that -il is the main body of a scraper theconventional parts whereof will not be speciiically described herein,

inasmuch' as they constitute no part vention.

This main-body ii is so mounteddas to pivot las a whole about the'axisof the front wheels I2.

of my in# On the rear wheels i3, there is mounted, to pivot` about theaxis thereof, an auxiliary frame Il.

.1, vslant facesstand at a substantial angle subi of the scraper.

Turning now to Figures 2 and 3, we see that each block carries a slantedge 23, adapted to engage each other When these slant edges first comeinto contact with veach other, this contact produces a sharp warningclick, apprising the operator that he ought at once to unclutch hiswinch. If he fails to hear the click because `of noise of the machinery,Athe drag on his engine will apprise him that he is'block-to-block. Ineither suchevent, if he fails to unclutch his winch immediately, as willvundoubtedly be the case if he is operating at an emciently high speedthe two slant edges will slide along4 each other, thusenabling thetaking-in of considerably more rope without damage to the mechanism.

Having now described and illustrated one form of my invention, I wish itto be understood that my invention is not to be limited to the specificform or arrangement of parts herein described and shown, except asspecifically covered by my claims.

I claim:

l. In a sheave block assembly, thecombination of: two sheave blocks; atleast one sheave carried by each; and va rope wound about the sheaves;each block having a contact face slanted with respect to the planejoining the axes of the sheaves, for contact with the other block, theseble after contact has occurred.

2. Asheave block assembly according to claim 1, further characterized bythe fact that the slant faces stand at an angle of approximately 45 tothe plane joining the axes of the sheaves.

3. A sheave block assembly according to claim further characterized bythe fact that thestantially less than 'tothe plane joining the axes ofthe two sets of sheaves. i

HORACE C. BEITZEL.

and slide along each other, as the blocks `are drawn together by ropeil.

